Sensor Life Tracking via Non-Volatile Counters
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Solution Overview
Problem
Existing analyte monitoring systems face issues with determining the elapsed or remaining sensor life after fault conditions, leading to unnecessary sensor replacements and calibration costs, as they lose data during events like power loss or system failures.
Innovation Solution
A method and system that utilize counters to track the initiation and incremental counting of analyte sensors, allowing for the determination of elapsed time and remaining sensor life, enabling the system to restart and continue using the same sensor after a fault condition, by comparing stored and incremental counts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system loses data during fault conditions (power loss, system failure), then the system reliability is improved by simplifying fault handling, but the sensor life tracking accuracy deteriorates causing unnecessary sensor replacements
Solution Approach 1:
The system performs preliminary actions by storing the counter value in non-volatile memory before the fault occurs. This ensures that even when the system loses power or experiences a failure, the elapsed time data is preserved and the sensor life can be accurately tracked without requiring sensor replacement.
2Device complexity
If the sensor is replaced after every fault condition, then the system simplicity is improved, but the operational duration deteriorates due to unnecessary replacements and calibration time
Solution Approach 1:
The system implements feedback by continuously monitoring the counter value stored in non-volatile memory to determine elapsed sensor life. This feedback mechanism allows the system to distinguish between actual sensor expiration and false triggers caused by fault conditions, enabling accurate tracking of sensor usage time and preventing unnecessary replacements.
3Measurement precision
If multiple finger sticks are performed for calibration after sensor replacement, then the calibration accuracy is improved, but the time consumption increases
Solution Approach 1:
The system performs preliminary action by preserving the counter data in non-volatile memory before any fault condition occurs. This ensures that when the system recovers from a fault, it can immediately resume tracking the same sensor's life without requiring recalibration or multiple finger sticks, thereby eliminating unnecessary time consumption.
Data Source
AI summary
Methods and systems for determining elapsed sensor life in medical systems, and more specifically continuous analyte monitoring systems.